ColorJitter.osl

// Index based Randomizer created Joseph Nickson
// Recreation of Arnold's alJitter for redshift, built off Saul Espinosa's shader
// This file is licensed under Apache 2.0 license
// Modified 06.13.2022 to add page data by Saul Espinosa.

shader rsInputJitter
[[  string help = "Randomizes an inputs colour using UserData.",
    string label = "ColorJitter" ]]
(
        // Defube Inputs
        color Input = 0 [[string page = "Input"]],
        int   Data   = 0 [[string label = "UserData", string page = "Input"]],
        float ValMin   = 0.0 [[string label = "Value Min", float min = -1, float max = 1, string page = "Value"]],
        float ValMax   = 0.0 [[string label = "Value Max", float min = -1, float max = 1, string page = "Value"]],                  
        float HueMin   = 0.0 [[string label = "Hue Min", float min = -1, float max = 1, string page = "Hue"]],
        float HueMax   = 0.0 [[string label = "Hue Max", float min = -1, float max = 1, string page = "Hue"]],  
        float SatMin    = 0.0[[string label = "Saturation Min", float min = -1, float max = 1, string page = "Saturation"]],
        float SatMax    = 0.0[[string label = "Saturation Max", float min = -1, float max = 1, string page = "Saturation"]],        
        float TempMin   = 0.0[[string label = "Temperature Min", float min = -.5, float max = .5, string page = "Temperature"]],
        float TempMax   = 0.0[[string label = "Temperature Max", float min = -.5, float max = .5, string page = "Temperature"]],         
        float TintMin   = 0.0[[string label = "Tint Min", float min = -.5, float max = .5, string page = "Tint"]],
        float TintMax   = 0.0[[string label = "Tint Max", float min = -.5, float max = .5, string page = "Tint"]],                            
        int   Seed      = 1[[int min = 0,int max = 100,string page = "Seed"]],                        

        /// Define Outputs                      
        output color ColorOut = Input,
)
{
        // Output Values
        float ratio1 = noise("cell", vector(abs(Data), abs(Seed), 10));
        float ratio2 = noise("cell", vector(abs(Data), abs(Seed), 11));
        float ratio3 = noise("cell", vector(abs(Data), abs(Seed), 12));
        float ratio4 = noise("cell", vector(abs(Data), abs(Seed), 13));
        float ratio5 = noise("cell", vector(abs(Data), abs(Seed), 14));  
        float HueShift = mix(HueMin, HueMax, ratio1);
        float SatShift = mix(SatMin, SatMax, ratio2);
        float ValShift = mix(ValMin, ValMax, ratio3);  
        float TempShift = mix(TempMin, TempMax, ratio4);
        float TintShift = mix(TintMin, TintMax, ratio5);          
        
        color Out = transformc("rgb", "hsv", Input);      
        Out[0] += HueShift;
        Out[1] += SatShift;    
        Out[2] += ValShift;
        Out = transformc("hsv", "rgb", Out);  
        
        // Temp & Tint Shifts
        Out[0] += TempShift;
        Out[1] += TintShift;
        Out[2] -= TempShift;
        ColorOut = Out;
}